Rocking-chair attachment



W. 1. BUNK'ER. ROGKING CHAIR ATTACHMENT.

(No Model.)

No. 405,3L1=1. l

PatentedJune 18, 1889.

LU V14 UNITED STATES PATENT OFFICE.

VILLIAM I. BUNKER, OF LA GRANGE, ILLINOIS.

ROCKlNG-CHAIR ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 405,341, dated June 18,1889.

Original application led September 9, 1887, Serial No. 249,270. Dividedand this application filed January l5, 1889. Serial No.

296.450. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM I. BUNKEE, a citizen of the United States,residing at La Grange, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Rocking-Chair Attachments, forwhich I made application for Letters Patent September 9, 1887, SerialNo. 249,270, and ofwhich the followin gis adivisional specification.

The obj ect of my invention, which is animprovement on the one describedin my patent of March 10, v1885, No. 313,707, is to make-a simple,cheap, compressible spring attachment for platform rocking-chairs; andthe invention consists in the features and combinations hereinafterdescribed and claimed.

In the accompanying drawings, Figure 1 is a vertical section showing oneof the rockers and base-rails of a platform rocking-chair equipped withmy improved attachment, the projecting part of the bracket within thecoils extending downwardly; Fig. 2, the same, except that suchprojecting part of the bracket extends upwardly; Fig. 3, a plansectional view taken in line fr so of Fig. l, and Fig. 4 a perspectiveview of the bracket having the extended portion.

A is the rocker; B, the base-rail; C, the connecting-spring; D, thebrackets, and d the extended portion of one of the brackets passingthrough the body of the spring, and E the portions of the bracketreceiving and holding the terminal coil of the spring.

My improved attachment consists, essentially, of a compressible spiralspring and suitable attaching-brackets, both the spring and bracketspreferably having the characteristics presently mentioned.

The spring is of course of suitable dimensions and length to form theconnecting medium between the rocker and base-rail, so that two beingused-one at the inside of each rocker and base-rail-they will operate toconnect and hold together the seat and base parts of the chair. Thespring, which is open-coiled,

so as to be readily compressed by the rocking of the chair, ispreferably made longer at one side than at the other. This may be doneby cutting both the end coils at the same side of the spring, or in anyother convenient way.

The attaching brackets are of course adapted to be secured to the endsof the spring and to the rocker and base-rail. I prefer to have one ofthem provided with an extended portion adapted to be passed up or downthrough the coils or body of the spring, and this extended portion hassuitable means for securing it to the end of the spring. As shown in thedrawings, but perhaps most plainly in Fig. 4, these means for securingit to the spring consist of projections having suitable grooves orchannels adapted to receive and hold the terminal coil of the spring;but of course other ways of securing the spring and bracket together atthis point may be used. This bracket maybe secured to either the rockeror base-rail, and its extended portion will then reach up or down andform a firm fastening or attachment for the opposite end of thespringthat is, for the end of the spring below the line of contactbetween the rocker and base-rail when the bracket is secured to therocker (see Fig. 1) and for the end of the spring above the line ofcontact when the bracket is secured to the base-rail. (See Fig. 2.)

The other bracket, which may also be secured to either the rocker orbase-rail, extends outwardly and preferably upwardly or downlwardly tothe extent necessary to enable it to be attached to the other end of thespringthat is, the end to which the extended portion of the bracketabove described is not attached. As in the other case, this bracket maybe connected to the spring in any suitable way-as, for instance, byprojections having suitable grooves or channels to receive and hold itsterminal coil.

It will be noticed that the brackets being constructed as above, one endof the spring may be grasped and held at the sidemof its coils adjacentto the rocker and base-rail and its other end at the side farthesttherefrom. This enables one of` the brackets to be made much shorterthan would be otherwise possible. The brackets being properly attachedto the springs and to the rockers and baserails of the chair, one springand set of brackets at the inside of each rocker and base-rail,

the whole attachment serves to firmly and se curely connect and hold therocking and base IOO parts 0f the chair together. I prefer to fasten thebrackets and spring,` together before applying them to the chair; butthis is not necessary.

I do not herein claim, broadly, a bracket having an extended portion topass through the body of the spring and be secured to one of itsterminal coils, the same being covered by the generic claims of myoriginal application, No. 249,270; but

I claiml. A platform rocking-chair attachment comprising,1 acompressible spiral spring' and two attaching-brackets secured theretoand holding the terminal coils of the spring at opposite sides thereof,substantially as described.

2. A platform rocking-chair attachment comprising` a compressible spiralspring and two attaching-brackets secured thereto and holding,` theterminal coils of the spring at opposite sides thereof, one at the sideadjacent to the rocker and base-rail and the other at the side farthesttherefrom, substantially as described.

3. A bracket for rockin g-chair attachments, comprising a plate to besecured to the rocker or base-rail, an extended portion to pass throughthe body of the coils, and projections at the end of the extendedportion adapted to receive and hold one of the terminal coils of thespring at one side of the body of the coils, substantially as described.

WILLIAM I. BUNKER.

Vit-nesses:

EPHRAIM BANNING, II. A. FARNHAM.

